Priority pass might make sense - there is apparently a new PP-affiliated lounge in the domestic side - CARAL VIP per the PP website. I don't know anything about it. Priority Pass seems to make sense for a lot of LAN travel (status or not). The Pacific Clubs in Chile, a couple of lounges @ EZE, SCL, and LIM. It is the only way to get any domestic lounge access flying LAN (albeit not everywhere, but LAN's domestic services are all one cabin and there is no lounge network).